From patchwork Sun Sep 27 19:49:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 260063 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BC85EC4727E for ; Sun, 27 Sep 2020 20:00:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7EED723A53 for ; Sun, 27 Sep 2020 20:00:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="luQoDsZ/"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="CJEGU8fP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727449AbgI0UAZ (ORCPT ); Sun, 27 Sep 2020 16:00:25 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:41642 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727063AbgI0T53 (ORCPT ); Sun, 27 Sep 2020 15:57:29 -0400 Message-Id: <20200927194921.547895614@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1601236646; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=JgK9BvUnrN5KEKte8DUJYLpLmg2eoJVVxGQL+B6LgJk=; b=luQoDsZ/u/OZYtSOAZUvOKs9PWs/xn3Mz7ihYBH07iWyk0cYbH7lfePHj2pixo6NiEWzXd oJXEanyJg17wF1R89tmpA4cZPQ7jd6nC+dYmWnuRgbgLMeEgYPG+MGV+HfCTPGG/sADs+n gABjIX7r/GvTIA+8sxMeBKz8mCQW2oWRNoq0+f1aWeklsZF6FstmRzRIucJlN8z77if1pH 78pWWVbFNdoTTJ9EKPafcdraXF/V6h2SLaeGCjPErStZAydScBaMCl4lN5glc2gFjh+Ls2 LgyOARL6jJEqCsBh2nRr8aDhFhiLLWGcSExs66CpX6oXwn28n1zEbjvDaPrAaw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1601236646; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=JgK9BvUnrN5KEKte8DUJYLpLmg2eoJVVxGQL+B6LgJk=; b=CJEGU8fPiYX7XdDsyUZbaXr4aORyMdfxxAauXdyIf1MRTiZHsG5EjttvXEle4mj7ShM7gt a8Zen0Ym17WFzmCg== Date: Sun, 27 Sep 2020 21:49:03 +0200 From: Thomas Gleixner To: LKML Cc: Peter Zijlstra , Linus Torvalds , Paul McKenney , Matthew Wilcox , Sebastian Andrzej Siewior , "David S. Miller" , Jakub Kicinski , netdev@vger.kernel.org, Christian Benvenuti , Govindarajulu Varadarajan <_govind@gmx.com>, Dave Miller , Jonathan Corbet , Mauro Carvalho Chehab , linux-doc@vger.kernel.org, Luc Van Oostenryck , Jay Cliburn , Chris Snook , Vishal Kulkarni , Jeff Kirsher , intel-wired-lan@lists.osuosl.org, Shannon Nelson , Pensando Drivers , Andrew Lunn , Heiner Kallweit , Russell King , Thomas Bogendoerfer , Solarflare linux maintainers , Edward Cree , Martin Habets , Jon Mason , Daniel Drake , Ulrich Kunitz , Kalle Valo , linux-wireless@vger.kernel.org, linux-usb@vger.kernel.org, Greg Kroah-Hartman , Arend van Spriel , Franky Lin , Hante Meuleman , Chi-Hsien Lin , Wright Feng , brcm80211-dev-list.pdl@broadcom.com, brcm80211-dev-list@cypress.com, Stanislav Yakovlev , Stanislaw Gruszka , Johannes Berg , Emmanuel Grumbach , Luca Coelho , Intel Linux Wireless , Jouni Malinen , Amitkumar Karwar , Ganapathi Bhat , Xinming Hu , libertas-dev@lists.infradead.org, Pascal Terjan , Ping-Ke Shih Subject: [patch 17/35] net: sun3lance: Remove redundant checks in interrupt handler References: <20200927194846.045411263@linutronix.de> MIME-Version: 1.0 Content-transfer-encoding: 8-bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Sebastian Andrzej Siewior lance_interrupt() contains two pointless checks: - A check whether the 'dev_id' argument is NULL. 'dev_id' is the pointer which was handed in to request_irq() and the interrupt handler will always be invoked with that pointer as 'dev_id' argument by the core code. - A check for interrupt reentrancy. The core code already guarantees non-reentrancy of interrupt handlers. Remove these check. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Thomas Gleixner Cc: "David S. Miller" Cc: Jakub Kicinski Cc: netdev@vger.kernel.org --- drivers/net/ethernet/amd/sun3lance.c | 11 ----------- 1 file changed, 11 deletions(-) --- a/drivers/net/ethernet/amd/sun3lance.c +++ b/drivers/net/ethernet/amd/sun3lance.c @@ -657,16 +657,6 @@ static irqreturn_t lance_interrupt( int struct net_device *dev = dev_id; struct lance_private *lp = netdev_priv(dev); int csr0; - static int in_interrupt; - - if (dev == NULL) { - DPRINTK( 1, ( "lance_interrupt(): invalid dev_id\n" )); - return IRQ_NONE; - } - - if (in_interrupt) - DPRINTK( 2, ( "%s: Re-entering the interrupt handler.\n", dev->name )); - in_interrupt = 1; still_more: flush_cache_all(); @@ -774,7 +764,6 @@ static irqreturn_t lance_interrupt( int DPRINTK( 2, ( "%s: exiting interrupt, csr0=%#04x.\n", dev->name, DREG )); - in_interrupt = 0; return IRQ_HANDLED; }